Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7077481 | Spring brake modulating relay valve A combined spring brake modulating relay valve integrates the functions of a relay valve and a modulating valve. The housing includes a valve assembly movable in response to air pressure provided to selected ports in the housing. A relay piston selectively communica... | 07/18/2006 |
| 6971404 | Pressure protection valve A pneumatic valve (10) for selectively controlling fluid flow through a pneumatic system of a vehicle is disclosed. The valve (10) includes a housing (12) having a cavity (28). The cavity includes an inlet (16) and an outlet (18... | 12/06/2005 |
| 6837552 | Hybrid brake system for a vehicle A hybrid brake apparatus for a vehicle includes a hydraulic brake circuit having a first fluid circuit and a second fluid circuit connected to a master cylinder for generating hydraulic pressure in the first and a second fluid circuits, and electrically actuated bra... | 01/04/2005 |
| 6769744 | Spring brake modulating relay valve A combined spring brake modulating relay valve integrates the functions of a relay valve and a modulating valve. The housing includes a valve assembly movable in response to air pressure provided to selected ports in the housing. A relay piston selectively communica... | 08/03/2004 |
| 6375275 | Railroad brake pipe overcharge and separation detection system A brake pipe overcharge detection scheme determines when an overcharge situation occurs followed by an interruption of the brake pipe slow pressure reduction process of the brake system assimilation. When the slow pressure reduction process is interrupted... | 04/23/2002 |
| 6312060 | Dual mode emergency braking apparatus and method of use thereof A dual mode brake system includes a first fluid actuated brake and a second spring actuated fluid released brake configured to spring actuate the first brake in the absence of receiving sufficient fluid pressure at the second brake. A first fluid control ... | 11/06/2001 |
| 5634696 | Railway brake pipe bracket with access ports A pipe bracket for use in a freight brake control valve on a railway freight vehicle is provided. Four access ports are preferably provided on a first side of the pipe bracket. The freight car piping, including a brake pipe, brake cylinder line, emergency... | 06/03/1997 |
| 4792192 | Automatic brake source select system A brake source select system for selecting one of a plurality of sources of pressurized hydraulic fluid for use in actuating a brake system. The brake source select system (10) includes a primary, secondary and reserve source (20, 22 and 24) of pressurize... | 12/20/1988 |
| 4763959 | Electronic control for fluid pressure braking system A fluid pressure braking system includes pressure sensors in each of the supply and service reservoirs and in the supply line to the trailer. The system includes an air compressor which is loaded and unloaded in response to variations in the pressure leve... | 08/16/1988 |
| 4736991 | Emergency pressurized fluid system An emergency auxiliary pressurizing system for a vehicle braking system includes a portable container having clean high-pressure pneumatic fluid therein and connected by conduit means to the vehicle braking system with the conduit having a pneumatic press... | 04/12/1988 |
| 4726628 | Protection valve device for spring parking brake systems A protection valve device for a spring parking brake control system has a pipe bracket for connection in a normally pressurized brake pipe, the pipe bracket having connected thereto a protection valve, a charging reset valve and a charging check valve. Th... | 02/23/1988 |
| 4474412 | Brake cylinder pressure maintaining valve A railroad air brake system for truck mounted air brakes includes an ABDW valve and auxiliary and emergency reservoirs with pipe connections therebetween. There is a brake pipe and a connection between the brake pipe and the ABDW valve. Truck mounted brak... | 10/02/1984 |
| 4174869 | Electro-hydraulic brake actuating system A brake actuating system especially useful for applying the brakes of a towed vehicle concurrently with application of braking pressure in the towing vehicle is provided which includes a variable valve means interconnected to the towed vehicle's conventio... | 11/20/1979 |
| 4125294 | Fluid pressure control valve device arranged for fail-safe operation In a proportioning type control valve device in which a piston valve assemblage is actuated to service position in accordance with a differential between brake pipe and control reservoir pressures on opposite sides of an actuating piston abutment forming ... | 11/14/1978 |
| 4071284 | Method and apparatus for effecting double-acting braking A method and apparatus for effecting double-acting braking for a wheel or a set of wheels permitting compensation of failures of at least one of the braking circuits of a double-acting braking arrangement of the type comprising at least two sets of brakin... | 01/31/1978 |
| 4049324 | Electro-pneumatic emergency brake control system for a vehicle train There is provided a brake system for a vehicle train which includes a tractor and a trailer, a source of high pressure air connected through an air control line to a pneumatic brake with the air control line in the tractor being connected to a fast-acting... | 09/20/1977 |
| 4033629 | Automatic freight car brake apparatus with spring-applied fluid-pressure-released hand brake The usual brake cylinder in a conventional freight car brake apparatus is replaced by a novel cylinder that embodies a pair of pistons and a spring of sufficient strength to effect a hand brake application. Conventional brake applications and releases are... | 07/05/1977 |
| 4003606 | Brake system In a vehicle brake system of the type employing both spring and service brake actuators, fluid which is discharged from the spring brake actuators at the initiation of spring brake application is exhausted through selected service brake actuators to effec... | 01/18/1977 |
| 3999810 | Hydraulic brake pressure modulator A hydraulic modulator which is positioned in a hydraulic brake pressure circuit forming a part of a brake system. The modulator uses power steering pump output fluid under normal conditions. When actuated, the relatively free flowing, low pressure fluid i... | 12/28/1976 |
| 3999075 | Control system for an integral spring-loaded parking and service brake A control system for a spring-applied service brake which can also be used as a parking brake. Pressure from the vehicle hydraulic system is normally used to release the brakes. In the event of a loss of the primary pressure from the hydraulic system, the... | 12/21/1976 |
| 3992064 | Vehicle brake system A multi-axle vehicle brake system includes an air receiving portion, a valve portion, an air storage portion and a brake portion. The air receiving portion receives air from a supply source. The valve portion is connected to the air receiving portion. The... | 11/16/1976 |
| 3970111 | Electromagnetic 3-way valve arrangement An electromagnetic 3-way valve arrangement having two valves, each controlled by a separate armature of a single coil solenoid, is described. The top end of each armature has a self-aligning closing element, and the two armatures are held apart by springs... | 07/20/1976 |
| 3945691 | Full-power hydraulic braking systems A full-power hydraulic braking system comprises two independently-powered service circuits serving separate sets of brakes, a common pedal-actuated dual brake valve controlling operation of said circuits, a spring brake actuator fed from both service circ... | 03/23/1976 |
